Sway Bar vs Stabilizer Bar: What’s the Difference Between Them?

The stabilizer and sway bars go by different names. You might know them by stabilizer link, anti-roll, and anti-sway bars. No matter what you know them by, they are basically the same thing. However, just knowing a bit about them will not cut it. It is also essential to know what they are and when you need to use one.

That is why in this topic of sway bar vs stabilizer bar, we are going to have a proper discussion about them. And from this article, you will be able to what they are, when to replace them, and how do they generally work. So, without further ado, let us get into describing them, shall we?

Sway Bars

Many might think that the sway bars and the stabilizer bars are the same things. Well, even if they do look a bit similar, they do not have the same operation. The main task of these is to keep the two front or rear tires in the same amount of extension.

But what will happen if the extension of the wheels is not the same? First of all, the center of gravity will be a bit off. Secondly, the chances of the vehicle rolling over the side will be exceptionally high. And you would not want the four-wheeler to jump on one side when treading on the roads, would you?


Design-wise, the sway bars generally have a u-shaped shape. They will be connected on each of the front wheels. And when making a turn, these will shift the weight to the other side. Thus, the chances of the vehicle rolling over to the turning side will be exceptionally low.

However, while turning, if the slope of the road is too much, they will not be able to do their work. They will only be able to keep the vehicle from rolling on flat surfaces.


As you know by now, the main task of these bars is to shift the overall weight to the opposite side while turning. However, there is much more to that. These sway the suspension of the wheels. And if the suspension is in a controlled state, the vehicle will be in level, and you will have proper control over it.

While the weight of the vehicle is transferred to the other side, the suspension of the wheels compresses because of these bars. So, when the wheels are making a turn, the suspension will extend. That will make it easier and safer to make sharp turns.

To give you a better idea about the operation, let us give you an example. When you are making a turn, you can actually feel your body moving towards the other side of the run. That is what swaying means. And if you make sharp turns in an instant moment, you are surely going to fall on the other side.

But if there was something that transferred your body weight on the other side, the swaying will not put that much of effect. And you would not trip on the other side. Well, that is how sway bars usually operate.

Stabilizer Bar

If you want to know about the stabilizer bars, in short, it basically keeps the camber from wobbling. It will ensure that the caster is not wobbling all over the place while driving. As a result, it can do wonders in terms of keeping the whole vehicle stable, which is why it has a “stabilizer” in the name.

However, you will not find any stabilizer bar or link in the off-road vehicles. They do not require this. The wheels will generally require more mobility, which eliminates the need for a stabilizer link. Also, the wheels are going to need more mobility for jostling all over the uneven terrain.


In terms of design, the stabilizer bars are not that different from the sway bar. These generally have a U-shaped design. However, the width of the shape is a bit higher than the sway bars. But some of the bars might also have a different design. It will basically depend on the vehicle it is supposed to go under.

Also, these are generally a bit thicker than the sway bars. That is why they do not give in that easily, even if the condition of the road is not that ideal.


When it comes to the overall operation, these have one main task: reducing the amount of wobbling. And these generally pair up with the suspension to offer that. Both the suspension and the stabilizer bar will work together to lower the overall amount of wobbling on the roads.

Just like the sway bar, allow us to give an example. While riding a car without a stabilizer bar, you will notice that the vehicle will rock from one side to another when going over a pothole. And the stabilizer bar will ensure that the rocking does not occur while going through terrains such as that.

In addition to reducing the wobbling, the stabilizer bar will also keep the vehicle a bit more stable while treading on uneven terrains. It can work like wonders in making the whole ride a bit more comfortable. However, these bars are only found on streetcars, not on offroad vehicles.

Differences Between Sway and Stabilizer Bars

Now that you have a proper idea regarding the sway and stabilizer bars, let us get into the differences that lie between them. And they are as follows:

Operational Procedure

The sway bars generally work to reduce the amount of sway and prevent rolling. They will shift the weight to the other side while making turns. As a result, the chances of the vehicle rolling flat on the other side will be exceptionally low. They will work with the suspensions and extend them whenever necessary.


On the other hand, the stabilizer bars do what they are named after, which is to stabilize the vehicle. They will basically lower the wobbling and shakiness of the ride. As a result, the ride can become more comfortable and smooth on different terrains.


When it comes to the installation position, the sway bars will be at the very front of the rear wheels. They will make sure that the weight is shifted on the other wheel while turning on one side.

However, the stabilizing bars will be on the lower control arm. And the case will be the same for all of the cars that have it. It will reside on the lower control arm of the car and nowhere else.

How to Tell If Sway Bar or the Stabilizer Bar Needs Replacing?

Knowing about the design and the operation of the bars will not be enough; you should also have an idea regarding when should one of these should be replaced.

And that is exactly what you are going to learn after reading this segment. So, let us not waste any more of your time and get right into it.

When to Replace The Stabilizer Bar?

The first thing you need to ensure is whether the vehicle has a stabilizer bar or not. As you know by now, some of the four-wheelers that are for the off-road terrains will not have these. They will require some motion to keep the wheels mobile, which is why the manufacturers do not install these on their off-road cars.

After ensuring that the car does have a stabilizer bar, be wary of these situations:

  • The vehicle is wobbling a bit on even roads
  • When the vehicle wobbles or shakes too much when going on top of a pothole or uneven terrain
  • You notice a degradation in the steering quality of your vehicle

If any of the aforementioned situations occur, get your car checked by a professional mechanic and get the stabilized bar replaced.

When to Replace the Sway Bar?

Unlike the stabilizer bar, the sway bar will be installed on all vehicles, even if it is an off-road one. Check if you notice any of these happening to your vehicle:

  • Steering wheel feels a bit loose
  • Too much swaying while taking a turn
  • Vehicle tends to lose its balance while taking a sharp turn
  • Any rattling noise coming from the underside of the vehicle

The aforementioned scenarios generally dictate that the sway bar has given up over time and needs replacement. Also, you would want to get it replaced as soon as possible, or else you might find yourself in a flipped vehicle while taking a turn on the roads.

Final Words

When it comes to sway bar vs stabilizer bar, you basically will need both of them to ensure a smooth ride on the asphalt. One can not take over the role of the other one, which makes both of them a necessity. However, if you own an off-road vehicle, get the sway bar only. The stabilizer bar will not be necessary for those.